Add master train/index.json — aggregates all 19 chunks with chunk-prefixed basenames so consumers can point at split=train without enumerating chunks.

Restructure train/: nest shards into chunk subdirs (batch 98/98)

Update train/index.json

Update train/index.json

Update train/index.json

Update train/index.json

Update train/index.json

Update train/index.json

Update train/index.json

Update train/index.json

Update train/index.json

Update train/index.json

Update train/index.json

Update train/index.json

Update train/index.json

Update train/index.json

Update train/index.json

Update train/index.json

Update train/index.json

Update train/index.json

Delete folder train with huggingface_hub

Upload folder using huggingface_hub

Upload folder using huggingface_hub

Upload folder using huggingface_hub

Upload folder using huggingface_hub